From: Connary, Julie Ann (jconnary@xxxxxxxxx)
Date: Wed Dec 27 2000 - 12:28:13 GMT-3
DJ,
The frame-relay reference specifically says that the reservable queues are
for voice - and all the examples refer to voice over frame relay.
It may not be specific to RSVP which could be any multicast or voice over
ip traffic that you wanted
to send that required low delay and can traverse many routers. So I'm
leaning towards the fair-queue for RSVP and frame-relay traffic shaping map
classes with frame-relay fair-queue when voice over frame relay is used. I
think Voice over Frame Relay is just "point-to-point" between two routers
that are frame connected vs. voice over ip which can go across many routers.
Then I guess the number of queues you would reserver for RSVP would depend
on the number of traffic flows, so
1000 still seems extreme for a single voip application.
Julie Ann
At 06:08 AM 12/27/2000 -0800, D. J. Jones wrote:
>I think I may have been in error Julie Ann. here is another link specific
>to RSVP parms only. Your original thinking was correct. Could someone help
>distinguish the difference between the two and under what circumstances they
>should be used? I would think even under a situation in
>which you were configuring for rsvp, that you should be able to specify a
>maximum buffer size? Or would that be negotiated during the time
>of reservation? ..dj
>
>
>qos commands
>http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/qos_
>r/qrdcmd1.htm#xtocid2777413
>
>frame relay commands
>http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/wan_
>r/wrdfrely.htm#37411
>
>----- Original Message -----
>From: "Connary, Julie Ann" <jconnary@cisco.com>
>To: "D. J. Jones" <meganac@home.com>
>Cc: <ccielab@groupstudy.com>
>Sent: Wednesday, December 27, 2000 5:35 AM
>Subject: Re: frame relay traffic shaping and rsvp
>
>
> > Thanks, that makes sense. I guess the software just knows to skip the 3rd
> > parameter since 1000 is greater than 100.
> >
> > Julie Ann
> >
> > At 03:09 PM 12/26/2000 -0800, D. J. Jones wrote:
> > >Julie Ann,
> > >
> > >I think what the fair-queue 64 256 1000 statement is saying is that you
>will
> > >have 64 allowed messages in each queue, 256 dynamic queues to be used for
> > >best effort conversations and a maximum buffer size of 1000 bytes.
> > >
> > >The number of reserved queues which you may be thinking of only has a
>range
> > >from 0 to 100 and a default value of 2. If you were to use all of the
> > >optional parms, then your statement would read:
> > >
> > >fair-queue 64 16 2 600
> > >
> > >If someone else reads this differently, please let me know..dj
> > >
> > >Here is a reference URL
> > >
> >
> >http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/wan
>_
> > >r/wrdfrely.htm#37411
> > >
> > >----- Original Message -----
> > >From: "Connary, Julie Ann" <jconnary@cisco.com>
> > >To: <ccielab@groupstudy.com>
> > >Sent: Tuesday, December 26, 2000 1:40 PM
> > >Subject: frame relay traffic shaping and rsvp
> > >
> > >
> > > > Hi All,
> > > >
> > > > I am working on a lab that calls for frame-relay traffic shaping and
>rsvp.
> > > >
> > > > My question is that when fair queing is enabled, the solution says:
> > > >
> > > > fair-queue 64 256 1000
> > > >
> > > > Does this not set up 1000 rsvp queues ( fair-queue
> > > > [congestive-discard-threshold[dynamic-queues[reservable-queues]]]] and
>why
> > > > would I need that many? Or am I misenterpreting the 1000?
> > > >
> > > >
> > > > Also what experience do people have using frame-relay traffic shaping
>with
> > > > map-classes vs. using the
> > > > traffic-shape rate command directly under the interface ( (From the
> > >command
> > > > reference for 12.0)?
> > > >
> > > > ------------------------------------------------
> > > >
> > > > traffic-shape rate
> > > >
> > > > To enable traffic shaping for outbound traffic on an interface, use
>the
> > > > traffic-shape rate interface configuration command. To disable traffic
> > > > shaping on the interface,
> > > > use the no form of this command.
> > > >
> > > > traffic-shape rate bit-rate [burst-size [excess-burst-size]]
> > > > no traffic-shape rate
> > > >
> > > > Syntax Description
> > > >
> > > > bit-rate
> > > > Bit rate that traffic is shaped to in bits per second.
> > >This
> > > > is the access bit rate that you contract with your service provider,
>or
> > >the
> > > > service levels you intend to
> > > > maintain.
> > > > burst-size
> > > > (Optional) Sustained number of bits that can be
> > >transmitted
> > > > per interval. On Frame Relay interfaces, this is the committed burst
>size
> > > > contracted with your service
> > > > provider.
> > > > excess-burst-size
> > > > (Optional) Maximum number of bits that can exceed the
> > >burst
> > > > size in the first interval in a congestion event. On Frame Relay
> > > > interfaces, this is the excess burst size
> > > > contracted with your service provider. The default is
> > >equal
> > > > to the burst-size.
> > > >
> > > >
> > > >
> > > > Default
> > > >
> > > > Traffic shaping is disabled.
> > > >
> > > > Command Mode
> > > >
> > > > Interface configuration
> > > >
> > > > Usage Guidelines
> > > >
> > > > This command first appeared in Cisco IOS Release 11.2.
> > > >
> > > >
> > > > Note Traffic shaping is not supported with optimum, distributed, or
>flow
> > > > switching. If you enable this command, all interfaces will revert to
>fast
> > > > switching:
> > > >
> > > >
> > > > Traffic shaping uses queues to limit surges that can congest a
>network.
> > > > Data is buffered and then sent into the network in regulated amounts
>to
> > > > ensure that traffic will
> > > > fit within the promised traffic envelope for the particular
>connection.
> > > >
> > > > Use traffic shaping if you have a network with differing access rates
>or
> > >if
> > > > you are offering a subrate service. You can configure the values
>according
> > > > to your contract
> > > > with your service provider or the service levels you intend to
>maintain.
> > > >
> > > > An interval is calculated as follows:
> > > >
> > > > If the burst-size is not equal to zero, the interval is the
> > > > burst-size divided by the bit-rate.
> > > >
> > > > If the burst-size is zero, the interval is the excess-burst-size
> > > > divided by the bit-rate.
> > > >
> > > > Traffic shaping is supported on all media and encapsulation types on
>the
> > > > router. To perform traffic shaping on Frame Relay virtual circuits,
>you
> > >can
> > > > also use the
> > > > frame-relay traffic-shaping command. For more information on Frame
>Relay
> > > > traffic shaping, refer to the "Configuring Frame Relay" chapter in the
> > > > Wide-Area
> > > > Network Configuration Guide.
> > > >
> > > > ------------------------------------------------------------
> > > >
> > > >
> > > > Thanks,
> > > > Julie Ann
> > >
> > ------------------------------------------------------------------------
> > > > Julie Ann Connary
> > > > | | Network Consulting Engineer
> > > > ||| ||| Federal Support Program
> > > > .|||||. .|||||. 13635 Dulles Technology
>Drive,
> > > > Herndon VA 20171
> > > > .:|||||||||:.:|||||||||:. Pager: 1-888-642-0551
> > > > c i s c o S y s t e m s Email: jconnary@cisco.com
> > > >
> > >
> > ------------------------------------------------------------------------
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